The June 1962 Alcatraz escape may have been the only successful escape from Alcatraz Federal Penitentiary in that facility's history. On the night of June 11 or early morning of June 12, inmates Clarence Anglin, John Anglin and Frank Morris tucked papier-mâché heads resembling their own likenesses into their beds, broke out of the main prison building via an unused utility corridor, and departed Alcatraz Island aboard an improvised inflatable raft to an uncertain fate.